Valve has has already started shipping Steambox prototypes to beta testers in the US last week, and one user’s gotten his hands on one and made an unboxing video, and another video showing all the guts of the machine.

Valve has revealed its third, planned announcement for the living room and it’s the Steam Controller – a “hackable” controller with dual trackpads, a touch screen, and haptic feedback that works with all past, present, and future games available through the Steam service.

Valve has released information for its Steam Box system which runs the recently announced Linux-based SteamOS. Beginning in 2014, there will be multiple SteamOS machines to choose from, made by different manufacturers.

Valve will be making the second of three announcements today regarding whatever plans it has in the works in a little over two hours. And as with anything pertaining to Valve making an announcement, Source Engine 2 has popped up.

Valve was widely thought to have backed the Xi3 Piston micro PC – often dubbed “Steam Box”. However, Valve’s Doug Lombardi has made clear that the Seattle studio no longer has any involvement in Xi3’s dealings.

Valve founder Gabe Newell officially announced that the company’s PC console – dubbed internally at the studio as ‘Bigfoot’, and its handheld counterpart ‘Littlefoot’ – at CES. However, speculation that it will be formally announced at GDC is wide of the mark, a Valve engineer has confirmed.